Recent content by Longtallted

Re the reference about Y plan being suitable only upto 26kw - I've got a Vaillant ecotec 637 which I believe is rated upto 40kw (largest number rating I found in the specs) but it's been installed in a Y plan (with a Megaflow hot water tank, I think it's a 250 litre item), all in a house with 15...